T-42 is a disability classification in the sports for differently-abled athletes with single "above the knee" amputations or a comparable disability.

Thangavelu, who hails from a small village in Tamil Nadu, was left permanently disabled after a bus ran over his right leg at the age of five. In March, he achieved the \'A\' qualification standard of 1.60m for the Paralympics with an effort of 1.78m at the International Paralympics Committe (IPC) and Grand Prix in Tunisia.

On the other hand, Varun Singh suffers from poliomyelitis, which is a deformity in one leg. In 2014, he won gold at the China Open Athletics Championship and finished fifth at the Asian Paralympic Games in Incheon, South Korea. He also won gold at this year\'s IPC Asia-Oceania Athletics Championship.